Explore giving every major region it's own individual ground plane for power measurement purposes

[gemarcano]

Our RocketLoggers do best in low-side power sensing, which means we need to monitor the current in the return path. To do this, we need to effectively isolate the grounds of every major component.

How do we link up all of the grounds? Other than at a single point, just have them join some central "main" ground?

[ppannuto]

The imix board ( https://github.com/helena-project/imix ) had separably measurable power for subsystems (radio, crypto stuff, core, maybe others IIRC) and can be a reference example of how to do this

[ppannuto]

You can ping hudson on tock slack at some point as well if you have any specific design questions — he spent a rev or two getting all that right if memory serves